Cop tube or hollow core for packages of yarn and the like



u Y14, 12,945'.` Y H L.y AMRHEIN E'TAl."

V'COPV TUBE OR HOLLOW CORE FOR TPACKAGES OF YARN AND THE LIKEY 'Y' YFiled June' 22, 1944 dllollaj:

' generally-1in similarV purposes.

' 'the-"plastic'fmateri ,iPdrent'e'dfug.v 14, .1945 'Y l if me man# i Li'April'ieatlini, @rellenas-14; serial .N01 v5415;, i Y l 51Gleim'. ;iw'l-eff- 1119ifk ',I'hiS pplication is Va. continuatiommeprtj of,

UnitedStates application Serial No. 500324, e'n- 5 The:present-mventionmeietes'td improvementsin coptubesor hollow' cores Ior e supp'ortingllyarn v xtile "machines` andV "to a, Vmethod, 'oi' prodilcingthe'fsame." 'f

jOne fobject"v o1'V 'the inventionds to" provide 'af lighft--vv'eight;l copf-tube'ror yarn-support or simple i construction-`=having a fsx'nooth- '-,exter'ivorfv surface; nOtSUbjc to Splittiggsplinteringobecomingf y dented? or frfgnened and more dummev in Y thariwooden olv-Aotliertupespreviously usedfor Antherfobjectf is to provide 'aA v.vernsupport or tiietype indicatedcomprising' -eipper dr faber Y Vlmshing Jrigidly seollredgthere 'at vone end andap1 as ferrule ite' `seeu'r/either perte against eletti-ve geef-j Y 'Y Ameherebleee l'1e tdprevidee methoddfi-meid;

barrel g'ofAYlil'ie cop-tubel which is simple 'to4 per-fi;

fdrnrdndu adapted' to produce emoredurablej. e article at' greatly reduced manufacturingfcosti I 'Further ljectsfo'ftheinvention are-set forth"-V i the following specification which deserribe's vd. Y preferred form of construction -of "the :improved copj-tube. a.nda"method of producing these-me, by waybr xemme; es" illustrated by theaecom-f l Figf-Ifis'fa. lon'gitudinal -view of a "cop-tube orV V.yarn-support incorporating the novel'features' offzthepresent' invention;- f Y lto s img. l2 isdn enlarged view -df the-same en mavjing the opposite ends` of the fcop-tubein section toillllstl'te 'the manner `of =m01dingY the thiinble i "COPTUB Bonnot-.Low CORE FoRrAcKi'f' AGES? 0mm mend Y1; Anil-nemend Emu E. tunel-gf weest or bushingfand the endsof its barrel;

' contractedend of the barrelyand f Y v Fg.-4.'is}a`transvers e sectionalivieweon the 'plastic head ox'ferrul'e is molded around the.,

yexpande,dYfla'nge-at the opposite end of the barrel.V

`zTn`eLpresent invention relates `.generally to cop-Y tubes orfhollo'vv cores adapted i for yvarious uses such 'as supporting theA yarn in'spinningbobbins and like textile copsy andpackages,l The present improved cop-tube `comprises' erbarrel -con` stituted by atub'e of ilbrous'l materia-L foxzfexr ample, Vpaperor compressed Vpulp', and having a r bearing bushing or. thimble within its interior'l at one end anda head orferrule surrounding., its oppositefend; each formediofsuitable molded plastic; In accordance withr'the lpresentinvert-l;A tionV the plastic4 elements 'are moldedr in:place Y around the endseof" the tube 'or barrel to com- :K

pletelv'surround' theiflbr'ous .nutterialr thereoiiand 25 e j fastening devices r-liable lto ibecoine"v llcxioseuned or Y broken. Preferably," theiend ofthe tbezorjlbarre is contracted circumferentially at'ne yendend th plasticv thimble molded around; thednterioxf,l andYY exterior" of this i portion ofi the-lbarreli withithe :f Y contractedportion Ythereof completely: enclosed: l bya'nd vembec'ldedfinthefmatex'ixtl'of the thimble e rThe Lopposite 'ende-of the tubeorbarrel may` havei y Uan expanded flange *withf theuplastifcgheadi ;or rferrulev molded therearoundwto:completelyen- Y close` the? expanded portion of Y the tube and-lem#- e' ;b"e`d ittherein. +1 1 Y l'teferringv torthe drawing," one Lformf of con-1 '(Vstruction 'ofi thezpresent' Vimprovedcope-tulle -or yarn-supportifi's illustrated hereinasgota 'typey generally used es a` core -for supporting'spinning Y Thelowerend of the' tubularbarrelz! is usually provided with an annularhead'orzferrule 5 lhaving an internal diameter substantiallyv vequal to the- Yinterior. diameter foi'rtlfie:tuber endz.; projecting radially outward? beyond .Sits periph-1 ,l eryintheformfof an"enlargementthereonzl The* oppositeend of fthetube- 2i`sprovided :with thixnbie rin' thenature of s .ebushing having la Abor'eofles's diameter than'tha't of the interior of xedly Y secure {thenry in yplacer withoutithe,YV yuse `of bobbins;

the vtube and'mdlded around the end `drehe lette penpherydfthe berrel. v t

Infthepresent drawingthe `tubelorbarrel 2 isy represented as composedoi'nbrou's'materlal such` heee' ef `fee-'die im dei 'sectional Yvievvfongline 3-3 'ofrFis 2Yshowins the mannery in wniehhe fe plastic athix'nble or bushing is moidedgaround-th as paper or compressed pulp;` Preferably; it consists` oflayersrofv paperor.; similar .sheet material wrapped. or wound labout a cylindrical` mandrelof suitable. diameter ywith the superimposed lay.-

ersfcemented together by an adhesive., Refer-v ring to Fig. 2, theloweror buttz'end ofthetubular barrel 2 mayrbe-formedvwith an integral ange" 3,` produced by.-:expanding.the flberor paper Vma-l terial duringconstruction of .thetube or aftenitst.

completionhj'he yflange 3 may be of'cylridrical.A

or. conical form :and ispreferablyrcurved or vbelled outwardly asshown` in. theadrawing. TheferruleA or head f5 lmay v take anyv suitablev shape.Y being.` .-hereinfshown .in theform. off. an Vfannulus-com--` posed of'. suitable thermosetting.' plasticmatsarial '15 molded tothe desired dimensions.' The heador ferruleV `5 is molded around the .end of the barrel 2 andrcaused to flow into'its'interior to provide...`

a lining thereforyfiush .with its .inner wally 'Atl the opposite endxofethe barrel 2 thebushing.

or thimble-6 isxlikewise of annular form-fitting. closely against the inner' wall of the barrel and fiushwithits outer'periphery. 'Thelbushing-.or

a tapered shoulder betweenits larger and smaller portions; for; molding `the taper at the inner end of the thimble.r Theaxial'mandrel or core-like insert "extending through the mold thus will pro- L.vide a supportrfor the tube or barrel 2 to maintain .it inconcentric relation with thewalls ofA the vcavity .in tthe mold;V the "arrangement being.

similar to that shown and described in the co pending application referred to above. If preferred, the ferrule. 5 and thimble' may bemolded on fthe ends". of thextube. during separate operations-but, preferably,vthe --mold may Vbe constitutecl .to form boththe ferrule and thimble at von'evoperation infthemanner as generally used for `molding plastic: material around cylindrical objects.' f 'I It isto be `particularlynoted that the plastic *l elements` atfopposite: ends of the tube or barrel thimble B'isprovid'edv'with.anaxial bore fsomeJ- what less in diameter thanA .that i of the interiorl of the barrel 2. The terminalportion of thefbar.-

2 are. of'fsuchshape` and contour vas to vcompletely surround the terminal portions of the .tube

whereof to" securelyjembed themtherein. Thus.;v

the hardenedl plastic materialiencloses` and "protects the..raw edges-of the fibrous.. tube and the ferrule andfthimbleare securely bonded thereto to prevent. them from( .turning thereon or being displaced yaxially thereof. When hardened,V the rel 2 ispreferably Vcontracted orfotherwiseshaped to` provide a cylindrical" Vflange 1 Cof reduced .di

axneter.:` The.: plastic materialof theA thimble 6. is molded .around the flange'l to surround .itsV

sides andend, thereby 'completely embedding thev flangeinthe .materialrc The outer peripheraLf.

surface ofthethimblel 6 is formed ilushwith the outer .periphery of the. barrelf-2,..thus` providing.

' a smoothsurface. so lthat whentheyarnisunf I wound from .thisxend ofthe cop-tubeit Acan bei.l

drawn oil iwithnutT obstruction; In some=.cases i the. bore V8 *of they thimble may, be tapered.

slightly and itsinner end vis preferably provided f with .a reentrantor.beveledeopening 9 to facili#l -tate placingthetube on-:thespindle V.with which it is used.A It willbef-understood that in spinningan'd. like` machines the spindle on-which theV cop-tube iszmounted is usuallylofy reduced gdiame.-Vv

terr at:.its kupperrendand the thimble orbushing.

6 is `adaptedv :to: fit snugly .'.ove'rthlsend of the,V

spindle'xto. providea proper bearingthereon.l

VThe presentV improved .cop-tube.; or yarn-sup-j plastic materialis of dense structure but nevertheless.somewhatfresilient so that if the cop-tube is subjected to rough handling. dropped on a Vcementfloor, `or otherwise Vbrought into contact with adjacent'objectsit rwillresist severe impact withoutchipping, splintering or denting. Conse `quently,'the tubeis protected atitsends to always `provide a smooth exterior surface. for the-yarn,

particularly at the end `carrying the thimble 6 across which the yarn draws in delivering it from the'.woundbobbin.` At. the same time, the thimble at theend ofthe bobbinjprovides a smooth bore for receivingvthev end of the spindle on which the cop-tube is mounted Withsaid bore disposed exactly concentric with the exterior .of the tube so that the latter will not run out when rotated with or on` the spindle. of` the machine in which it is used.; Y v

f It will be observed. from the foregoing specification that the present invention provides for producing cop-tubes oryarn-supports of improved port 'may be manufactured kby yirst forming ythe barrelz froma paper:l or fibrousf sheet wound orv wrappedaround amandrel .and cementing the layers. togetherwith asuitable adhesive as they are beingzapplied oneover another. The flaring or conical flange@ at the 4lowerfend of thetube 2 f maybe formed` by shaping'the. mandrel to a corz responding'. contouror by expanding the;end. of

. thetube after. it -has'been completed.V Likewise,V thereduced'angel "ati the :opposite'end ofthe tube may bezformedbycontracting the fiber or-V paper-material. arounda reduced portion of the around.v or'` it Vmaybe'` shaped vlater under. corni'- pression.a.

y mandrel while1the layersare beingwoundtherei Afterthetubenl hasbeenV 'completed with .its ,Y

ends: shaped as described' itmay be placed fin a mold-having an opening conforming to its' cyf with a reduced portion atoneiend shaped to.con form: to' theibolre vof'. the thimble 6to be produced.` Iy'he4 mandrel :may j also f be formedV with v construction, relativelylight in weight, economical-to manufacture,andpossessing maximum resistance to splitting, chipping or marring to insure greater durability under hard use. The endsfof the barrel of thecop-tube beingconstructed of thermosetting plastic or other vulcanizable material molded directlyrfonv and firmly bonded vto the. fibrous tube provide anextremely strong and permanent structure with va smooth rilnlsh on all exterior surfaces. Y

ByY molding the plastic` material directly onto thebertube the presentmethod of producing the improved 4.article maybe practicedwithout especial skill. or expertness while resulting ln greater accuracy. inv forming. the ferrule ,and thimbleV concentrically of the tubular.- barrel. While the improvements are herein'shown as ap- '.pliedfto lusejto produce a cop-tube of the type l dimensions Vof the tube. may be varied as desired withoutdepartingfrom.thespirit or scope of the invention;` Therefore, -without limiting ourselvesv in this'respect', we claim:A Y

1. A cop-tube yor yarn-.support for textile ma-v terials comprising -sa tubular ber barrelY Vcontracted at oneend to forma terminal portion of reduced diameter; and a plasticzthimblemolded 2,381,869 v 3 therein and formed with a. bore `of less diameter.

around the end oi? the barrel surroundingthe re-v l duced terminal portion thereof and extending into its interior to provide a bore of smaller diameter than that of the'interor'of ,the barrel.

2L A core or support for bobbins and the like consisting in atubular barrel having one end contracted to formaterminal portion of lesser diama eter than :the body oi the tube, and a'ferrule of thermosetting plastic material molded around theY end of the `barrel,cox'npletelv enclosing its reduced terminal portion YVwith its outer periphery flush with that ofthe barrel and its interior of less diameter than the interior of the barrel.

3; A cop-tube or yarn-support of the type indicated comprising a tubular iiber barrel'having an Aexpanded flange at one end anda contractedV Y iiange at its opposite end, a plastic Ierrule molded around one end of the barrel with the expanded terminal ange'embedded therein and enclosed on all sides by said'material, said erruleV having an ulterior wan flushwith the interiorof the tube, and a plastic thimble molded around theopposite Aend of the barrel surrounding `the reduced terminal flange with the latterembedde'd than that of the interior of the tube.

4. A method of producing cop-tubes or yarnsupports consisting in forming a fiber tube with a contracted portion at one end, andmolding a vferrule of plastic material around the end of the Y tube with thecontracted terminal fiange'thereoi completely Vembedded in 4and surrounded on all sides byA said material to firmly bond the Aferrule thereto with its Vinner wall-lining the interior o f the tube toprovid'e'a'reduced bore at its end.-

5. A method'of manufacturing cop-tubes or 'yarn-supports comprising forming a tubular barrel by winding a sheet'of fibrous material about a mandrel and cementing the superimposed layers 

